Geochemical features and formation conditions of Late Precambrian volcanics in the southern part of the Lyapin tectonic zone (Northern Urals)
https://doi.org/10.24930/1681-9004-2025-25-6-1350-1364
Abstract
Research subject. Volcanogenic rocks belonging to the Sablegorskaya formation of the Upper Riphean–Vendian in the southern part of the Lyapin tectonic zone (Northern Urals).
Aim. Reconstruction of the stages and paleo-environments of volcanic rock formation.
Methods and materials. Geochemical studies and interpretation of geochemical parameters were performed using geological and isotope-geochronological data.
Results. Geochemical features of volcanogenic rocks belonging to the Sablegorskaya formation indicate heterogeneity of their compositions, which may indicate the presence of several rock groups formed under different conditions. Radiological determinations of the age of rocks have a range of more than 100 million years, from the Ediacaran to the Late Cambrian (Furongian). This finding does not contradict the idea of the action of several pulses of magmatic activity. An assumption can be made about a spatial combination of volcanogenic formations of several paleoenvironments of different ages – Precambrian suprasubduction and Early Paleozoic rifting –within the Lyapin tectonic zone.
Conclusions. An assumption is made that the volcanogenic rocks currently attributed to the RF3-V Sablegorskaya formation were formed in the rear of the Late Precambrian active continental margin at an early stage of continental rifting in the Early Paleozoic.
Supporting agencies: The studies are carried out as a part of the IGG UB RAS state assignment (state registration No. 123011800013-6) using the “Geoanalitik” shared research facilities of the IGG UB RAS
About the Author
G. A. Petrov
A.N. Zavaritsky Institute of Geology and Geochemistry, UB RAS
Russian Federation
Russian Federation
Georg A. Petrov
620110; 15 Academician Vonsovsky st.; Ekaterinburg
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For citations:
Petrov G.A. Geochemical features and formation conditions of Late Precambrian volcanics in the southern part of the Lyapin tectonic zone (Northern Urals). LITHOSPHERE (Russia). 2025;25(6):1350-1364. (In Russ.) https://doi.org/10.24930/1681-9004-2025-25-6-1350-1364
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